STATEN ISLAND -- In a stunning blow, incumbent Republican Rep. Dan Donovan lost his congressional seat to political newcomer Max Rose on Tuesday, walking away with 47 percent of the vote in New York City’s only competitive Congressional race.

With his daughter and partner Serena Stonick by his side, Donovan briefly thanked supporters for allowing him to serve NY-11 for the past three years and congratulated Rose in his victory.

“I just got off the phone with Max Rose and I asked him to do a good job for my family and yours, and he promised me that he would,” Donovan said to a crowd of supporters at Prive in Annadale. “I congratulated him on a hard fought effort, it’s been an amazing ride for our family.

“The last 22 years of my entire adult life I’ve served this community, and it’s been an honor and a privilege, something I will never forget, and I will never forget you for giving me that opportunity.”

Rose won 52.5 percent of the vote

CONSIDERING ‘THE NEXT CHAPTER’

During a gathering of Republicans at Prive in Annadale, Donovan said he would take the next couple of days off from politics, go "somewhere warm” with his family, and come back to see "what the next chapter of our life is going to be.”

Heading into Tuesday’s midterm elections, there were 205,507 registered Democrats and 119,731 registered Republicans in NY-11 as of Nov. 1, with 70 percent of those voters from Staten Island, home to 48 percent more Democrats than Republicans.

HIS YEARS OF SERVICE

Donovan first took office in May 2015 after winning a special election to replace former Rep. Michael Grimm, who resigned after pleading guilty in a federal tax evasion case.

Since that time, Donovan made helping victims of Superstorm Sandy and 9/11 top priorities of his.

Though an avid Trump supporter who won the president’s endorsement over the summer in the lead up to the primary election, Donovan at times broke away from the president on key issues.

Donovan voted against Trump on three of the president’s key agenda items including the tax reform bill, the Affordable Care Act repeal and punishing sanctuary cities. The incumbent said those bills were bad for Staten Island and South Brooklyn.

The city’s only Republican borough can often be tough to predict. Democratic President Barack Obama won the Island in 2012 and former Rep. Michael Grimm was still re-elected to Congress that same year.

Donovan had served as New York City’s lone Republican member of Congress since 2015.

THE 'BLUE WAVE’

Following Donovan’s defeat, some supporters said they were upset by Rose’s victory, but conceded that a blue wave was bound to happen.

“We’ve seen red for so long, we were bound for a correction .. life goes on,” Brian Mcgowan of Tottenville said.

Others, were frustrated to see a longtime Staten Island politician they said they trusted, go.

“I think [Donovan’s] opponent was less than honest in the way he ran his campaign,” said Allan Katz of Pleasant Plains.

Katz said he thought it was disingenuous for Rose to say he would not take campaign money from corporations, but to accept funding from big name national Democrats.

MONEY AND MANPOWER

Donovan’s Tuesday night defeat also showed that money and manpower were key in the city’s only Republican stronghold, which voted for Trump in 2016.

Rose out fundraised Donovan during the campaign and often times, it appeared the Army veteran had more political volunteers too, who could be spotted canvassing for the Purple Heart and Bronze Star recipient all around the borough.

In the latest campaign contribution filings, Rose had a little over $1 million in his campaign coffers, while Donovan had just a little over $250,000.

Ahead of the midterm elections, a New York Times/Siena College poll showed the candidates neck and neck with Donovan leading Rose 44-40 within a 4.7 percent margin of error and 15 percent of voters surveyed saying they were undecided.

A FLOOD OF CAMPAIGN ADS

Leading up the election, the candidates had also put out a slew of attack ads.

Rose’s campaign slammed Donovan in an ad for taking campaign contributions from Purdue Pharma executives (Donovan has since pledged to donate the contributions to Island drug treatment centers).

While Donovan sought to tie Rose to liberal campaign issues that have emerged in the midterms and commissioned a televised ad calling Rose “not one of us.”

Rose, who last worked in health care, supported passing a federal infrastructure bill to finish expanding the Staten Island Expressway, building a light rail to New Jersey, and expanding ferry service.